I have a strong disliking for the Crysta system because of how it works. I posted this in another thread a while ago, but it explains what is wrong with the 'universal currency' named Crysta.

The Crysta system was a nice idea, but poorly implemented. It has holes all over it and will eventually cause more hassle than it's worth. Instead of creating a single universal currency for customer interaction with SE, it has created different kinds of Crysta but without the names. ie. you have US$ Crysta, €Euro Crysta, £GBP Crysta, and I'm sure a load of other currency Crysta's, none of which have the same value. Why does it have to be so complicated?

If you had valued all Crysta the same to start with, and allowed people to purchase that Crysta in relation to the value of their currency we could have had a universal currency. Instead, down the line, we'll have things for sale and e-mails saying X product costs 100 Crysta if you live in Europe, but 90 Crysta if you live in the UK, or 170 Crysta if you live in the US, etc. Then there's the rediculous logistics of customers changing residence between countries. Whoever thought up the Crysta purchasing methods was definitely off their game that day.

If the Crysta system is going to be fixed to make sense it's better it's done before people start paying subscription fees.